# right angle

- the angle formed by two radii of a circle that are drawn to the extremities of an arc equal to one quarter of the circle; the angle formed by two perpendicular lines that intersect; an angle of 90°.

## Origin of right angle

## Examples from the Web for right angle

### Contemporary Examples of right angle

### Historical Examples of right angle

Obtuse, an angle having a wider opening than a right-angle or "perpendicular."

Stained Glass WorkC. W. Whall

At the epicentre, the angle of emergence is a right-angle; at a great distance from the epicentre, it is nearly zero.

A Study of Recent EarthquakesCharles Davison

Its bole, five feet of stalwart diameter, rose straight and tapering to the first right-angle limbs, each in itself almost a tree.

The Roof TreeCharles Neville Buck

At length he rose and climbed on, presently turning at a right-angle to bisect the strip to its boundary before he paused to rest.

The Valiants of VirginiaHallie Erminie Rives

The toe is never pointed in line with the leg, but held at a right-angle to it, as in the standing position.

The Morris BookCecil J. Sharp

## right angle

- the angle between two radii of a circle that cut off on the circumference an arc equal in length to one quarter of the circumference; an angle of 90° or π/2 radians
- at right angles perpendicular or perpendicularly

## right angle

- An angle having a measure of 90°.

## right angle

An angle measuring ninety degrees, formed by the intersection of two perpendicular lines. (Compare acute angle and obtuse angle.)